Siemens SINUMERIK 828D Programming Manual page 258

Motion commands
9.10 Thread cutting with constant lead (G33)
Multiple thread
Multiple thread (thread with offset cuts) can be machined by specifying a starting point offset.
The programming is performed in the
Note
If no starting point offset is specified, the "starting angle for thread" defined in the setting
data is used.
Thread chain
A thread chain can be machined with several
Note
With continuous-path mode
such a way that there are no velocity jumps.
258
block at address
G33
blocks programmed in succession:
G33
, the blocks are linked by the look-ahead velocity control in
G64
Programming Manual, 07/2010, 6FC5398-1BP40-0BA0
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SF
Fundamentals